Neco 2022 Physics Question 3
Practice objective / multiple choice question 3 from the 2022 Neco Physics examination.
A rectangular coil of 40 turns has an area of \(A = 0.02\) m\(^2\). It rotates uniformly in a uniform magnetic field of magnitude \(B = 0.30\) T at a frequency of \(f = 50\) rev s(^{-1}). (a) Calculate the maximum (peak) emf induced in the coil. (b) If the coil's resistance is \(R_c = 10\) Ω, find the peak current. (c) An external resistor is to be added so that the peak current does not exceed \(0.20\) A. Determine the required resistance of this external resistor (to the nearest ohm).
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About This Question
This is Neco 2022 Physics Question 3. It is one of the objective questions from the 2022 Neco Physics examination.
Difficulty level: Hard .
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